HD (high density) layer
•Super Audio CD (dual layer disc)
This disc consists of dual HD layers and is capable of extended play over long periods. Also, as the dual layer disc consists of dual HD layers on one side only, you do not have to turn the disc over during playback.
HD layer
HD layer
•Super Audio CD + CD (Hybrid disc)
This disc consists of an HD layer and a CD layer. Also, as the dual layers are on one side only, you do not have to turn the disc over during playback. You can play the CD layer using a conventional CD player.
CD layer
HD layer
•2 channel +
2 channel playback 
area
Title (page 10)
The longest section of a picture or music feature on a DVD, movie, etc., in video software, or the entire album in audio software.
Track (page 10)
Sections of a picture or a music feature on a CD or VIDEO CD (the length of a song).
Information Additional
89